Assurance system and assurance method

Abstract

In a client PC or device, the reliability of multiplexed authentication servers is assured. In an assurance system including a client PC (1-1, 1-3), an authentication server 1 (1-7), and a device (1-5) connected to a network, a multiplexed system is built by arranging an authentication server 2 (1-8) in order to back up the authentication server 1 (1-7), public key cryptography is used for encrypted communication between the client PC, the authentication servers 1 and 2, and the device, and the public keys of the authentication servers 1 and 2 are electronically signed by using the private key of one system administrator (1-10) by public key cryptography.

Description

FIELD OF THE INVENTION

[0001] The present invention relates to an assurance system including a plurality of client server PCs, devices, and an authentication server which authenticates users who will use the client server PCs and devices and controls access to resources and, more particularly, a duplexed system (redundant system) which backs up the function of an authentication server when failures occur in it and, more particularly, a system which imparts reliability to a plurality of authentication servers including the redundant system and confirms the reliability. BACKGROUND OF THE INVENTION

[0002] If a user wants to use a resource of some kind on a logic domain including client PCs, servers, and devices connected to a network, authentication of the user and grant of a resource access right are necessary. An authentication server in the client server system makes use of its function to authenticate the user and grant an access right on the basis of a unique or standardized proto...

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